code: def test_merge_from_json_dict_and_str(self):
      json_dict = json.loads(_FULL_JSON)
      json_str = json.dumps(json_dict)
  
      model_card_from_dict = model_card.ModelCard()
      model_card_from_dict.merge_from_json(json_dict)
  
      model_card_from_str = model_card.ModelCard()
      model_card_from_str.merge_from_json(json_str)
  
      self.assertEqual(model_card_from_dict, model_card_from_str)
  
imports: import json
  import os
  import pkgutil
  import jsonschema
  from absl.testing import absltest
  from google.protobuf import text_format
  from model_card_toolkit import model_card
  from model_card_toolkit.proto import model_card_pb2
label_desc: Use image node_id 12 for calling the ModelCardTest obj's underlying member method code with example usage: obj.test_merge_from_json_dict_and_str() without return types